Function ParseOconfigFlag

tools/opt/opt.cpp:667–699

Parses and handles the -Oconfig flag. |prog_name| contains the name of the spirv-opt binary (used to build a new argv vector for the recursive invocation to ParseFlags). |opt_flag| contains the -Oconfig=FILENAME flag. |optimizer|, |in_file|, |out_file|, |validator_options|, and |optimizer_options| are as in ParseFlags. This returns the same OptStatus instance returned by ParseFlags.

//
// This returns the same OptStatus instance returned by ParseFlags.
OptStatus ParseOconfigFlag(const char* prog_name, const char* opt_flag,
                           spvtools::Optimizer* optimizer, const char** in_file,
                           const char** out_file,
                           spvtools::ValidatorOptions* validator_options,
                           spvtools::OptimizerOptions* optimizer_options) {
  std::vector<std::string> flags;
  flags.push_back(prog_name);

  std::vector<std::string> file_flags;
  if (!ReadFlagsFromFile(opt_flag, &file_flags)) {
    spvtools::Error(opt_diagnostic, nullptr, {},
                    "Could not read optimizer flags from configuration file");
    return {OPT_STOP, 1};
  }
  flags.insert(flags.end(), file_flags.begin(), file_flags.end());

  const char** new_argv = new const char*[flags.size()];
  for (size_t i = 0; i < flags.size(); i++) {
    if (flags[i].find("-Oconfig=") != std::string::npos) {
      spvtools::Error(
          opt_diagnostic, nullptr, {},
          "Flag -Oconfig= may not be used inside the configuration file");
      return {OPT_STOP, 1};
    }
    new_argv[i] = flags[i].c_str();
  }

  auto ret_val =
      ParseFlags(static_cast<int>(flags.size()), new_argv, optimizer, in_file,
                 out_file, validator_options, optimizer_options);
  delete[] new_argv;
  return ret_val;
}

// Canonicalize the flag in |argv[argi]| of the form '--pass arg' into
// '--pass=arg'. The optimizer only accepts arguments to pass names that use the